If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.

Announcement

Collapse

Forum Issues Update

We are continuing to work diligently to resolve the issues currently being experienced with the PhotoPlog. Thank you for your patience!

Fireclay in Europe (DK)

06-06-2013, 11:54 PM

Hello All,
I really want to be using the homebrew mortar for my oven and I've been searching like a mad man for fireclay, but so far I haven't been able to find anything which matches the description of fireclay. I find this strange because when I read through old threads on this forum, I often see people mention that fireclay is used widely in construction here in Europe (I'm from Denmark btw).

Can anyone prehaps tell me the name of one of the major brands here in Europe? Perhaps I can then find it by searching for the brand instead of the term "fire clay".

If everything fails and I can't find fireclay is the anything I can use instead?
Sand, portland, lime and ...?

Gudday
The fireclay component of the home brew is to make the mortar sticky and plastic. Since our ovens don't get to the temperatures were the refractory nature of fireclay is required you can substitute powdered clay made for masonry use. Often you can find " bricklayers sand " with the clay already added.
Hopes this will help you widen you search
Regards dave

Comment

A true fireclay as used by potters or refractory manufacturers is a highly refractory unfired clay (able to withstand very high temps).
Chamotte (grog) is fired to around 1000C and then ground. It will not break down to the extremely small particles like unfired clay will. Another advantage is that it is already shrunk so can reduce overall shrinkage if added to a clay body. There is all kinds of grog, ground to different grades. Potters use it to add to clay bodies for different purposes in their production.
The fireclay bricklayers use is not a specially refractory clay like a true fireclay (at least that is the situation in Australia), it is a powdered clay quite high in silica (the glass former)
Because we do not fire to extreme temperatures I think any unfired powdered clay should be ok. Bricklayers clay, which is the cheapest, is what I use.
Sorry about the longwinded reply, but there is considerable confusion about fireclay, hope this helps.